Improvement in middlings-purifiers



UNTED STATES PATENT OEEIoEo GEORGE PARKER, OF POUGHKEEPSIE, NEIN YORK.

IMPROVEMENT IN MIDDLINGS-PURIFIERS.

Specification forming fait of Letters Patent No. 152,162, dated June 16, 1874; application liled May 18, 1874.

To all rwhom lit may concern:

Be it known that I, GEORGE PARKER, of

Poughkeepsie, in the county of Dutchess andl i specification.

This invention is in the nature of an improvement in middlings purifiers; and this invention consists of a middlings -purifier wherein the screens and carriers are so combined with a sliding frame that the angle of their inclination maybe adjusted as desired.

[n the accompanying sheet of drawings, Figure l represents a longitudinal section of my purifier and Fig. 2, a plan view, partly in section.

Similar letters of reference indicate like parts in the two figures.

'A represents the framework of a middlin gspurifier, which may be of any desired size and shape, and may be constructed of anydesircd material. Vithin the frame work A are sccured a series of bolting screens, al a2. The frames b, to which these screens are attached, are aiixed, at one end, to the inner side of the frame-work A, in such manner that they may have a slight perpendicular, as well as horizontal, motion imparted to them, and the other end of the screens is secured in like manner to a sliding frame, B. The ends of the frames b that are secured to the trame-work have attixed to them spiral springs c. Immediately above each of the several screens, excepting the first one, is secured to the sliding frame B and case A a frame-work, d, onto which are affixed rollers c; and around these rollers pass endless bands of cloth or canvas E. Upon the upper part of the framework A is placed an exhaust-fan, F, and also a hopper, f. This 110pper is made in the shape ot' an hourglass, within the lower half of which revolves a con e, g, and below this cone is placed a plate, G, which plate is affixed to a shaft or arbor, h. On one side of the frame-work A is tted an air-trunk, H, to which free access is had from the interior of the purifier; and on the other side of the purifier, immediately opposite this air-trunk, are tted a series of sliding gates, I. Below the purifier is placed a garner, J.

My purifier being constructed substantiallyr as above described, its operation is as follows: The middlings to be purified is placed into the hopper j', whence it falls onto the plate G, which revolving rapidlyT by means of a belt, or in any desirable way, it is scattered on the surface of the rst bolting-screen al, the finer particles passing through this screen or bolt, and falling upon the surface of the carrier E, which is moving from left to right by the action of the rollers e, which are caused to revolve by the belt j, or in any desirable way. The siftings thus deposited is carried, by this action of the carrier, over the left-hand roller,

whence it falls, by gravity, onto the screen or bolt a2, to be again screened and reduced; and, from this last-mentioned screen, onto another endless carrier placed beneath it, and so on through the series of screens and carriers, until it is deposited in the garner J, whence it is delivered. rlhe finer particles of chaff and our are drawn, by the action of the eX- haustfan F, from the middlings as it passes from the screens to the carriers, by inducing currents of air between the under sides of the screens and the upper surfaces of the carriers to draw it into the airtrunk H, and thence through the shell of the fan, and out through the openingk. The heavier particles fall, by gravity, to the bottom of the air-trunk, and are discharged therefrom by openin g the gate R.

To facilitate the passage of the middlings through the screens, a reciprocating, horizontal, and up-and-down motion is imparted to the screens by the act-ion of the cams m, which revolve, and trip the ends ofthe screens a., and, at the same time, giving them a slight hori.` zontal thrust, which is returned by thereaction of the springs c.

rlhe inclination of the screens a and carriers,- to enable the middlings to gravitate more or less rapidly on them, may be increased or diminished by raising or lowering the frame B by means of the handle s, or otherwise; and the intensity of the current of air under the screens may be regulated more or less by operat-ing the sliding gates I. All tendency of the current to pass through the sever al screens is prevented by check-plates T.

hen it is desired to purify buekwheat-xniddlings, the bucliwheat is placed into the hopperf, and the cone g caused to revolve, grindin g the buekwheat between the surface of this cone and the interior lower surface of the hopper .suicientltxv to remove the hulls therefrom. Then the hopper is used for ordinary iniddlings, the cone g may be removed; or it may belowered sufficiently to admit of the passage of the middlings between it and the sides of the hopper.

The garner J has imparted to it a motion the same as is imparted to the screens, and by the same means-that is, cams and springs; and the garner may be provided with 011e or more openings, p, through which the iniddlings is withdrawn.

Instead of having,` a garner constructed as hereinbefore described, an endless 'carrier may be substituted therefor, to carry the purified middlings, and deliver it at any point desired.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

In a middlings-purier, the screens and carriers thereof, in combination with a sliding frame, all constructed and arranged to operate in the manner described, whereby the angle of their inclination may be adjusted, substantiall)T as and for the purpose specified.

GEORGE PARKER.

Vitnesses H. L. VATTENBERG, G. M. PLYMPTON. 

